| plumb bob n. A usually conical metal weight attached to the end of a plumb line. Also called plummet. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  plumb bob - the metal bob of a plumb line bob - a hanging weight, especially a metal ball on a string plumb line, perpendicular - a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point |
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